What is the effect of increased stroke volume on the end-systolic volume (ESV)?
Understand the Problem
The question is asking about the relationship between increased stroke volume and end-systolic volume (ESV) in the context of cardiovascular physiology. It seeks to understand how an increase in the volume of blood pumped by the heart with each beat affects the amount of blood remaining in the ventricles after contraction.
Answer
Increased stroke volume decreases end-systolic volume (ESV).
An increased stroke volume generally results in a decreased end-systolic volume (ESV), since more blood is ejected from the heart during systole, leaving less volume remaining in the ventricle.
Answer for screen readers
An increased stroke volume generally results in a decreased end-systolic volume (ESV), since more blood is ejected from the heart during systole, leaving less volume remaining in the ventricle.
More Information
Increased stroke volume is typically due to increased heart contractility or decreased afterload, which leads to more complete ejection of blood and thus reduces ESV.
Tips
A common mistake is forgetting that stroke volume and end-systolic volume are inversely related when considering the heart's mechanics.
Sources
- Physiology, Cardiac Output - StatPearls - NCBI Bookshelf - ncbi.nlm.nih.gov
- Heart Stroke Volume - an overview | ScienceDirect Topics - sciencedirect.com
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